<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <meta http-equiv="X-UA-Compatible" content="ie=edge">
        <title>v-show指令</title>
    </head>
    <body>
        <div id="app">
            <input type="button" value="切换显示状态" @click="changeIsShow">
            <input type="button" value="累加年龄" @click="addAge">
            <img v-show="isShow" src="./img/monkey.gif" alt="" srcset="">
            <img v-show="age>=18" src="./img/monkey.gif" alt="" srcset="">
        </div>
        <!-- 1.开发环境版本，包含了有帮助的命令行警告 -->
        <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
        <script>
            var app = new Vue({
                el:"#app",
                data:{
                    isShow: false,
                    age:17,
                },
                methods:{
                    changeIsShow:function(){
                        this.isShow = !this.isShow;
                    },
                    addAge:function(){
                        this.age++;
                    },
                },
            })
        </script>
    </body>
</html>